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Note 7 - Inventories (Tables)
3 Months Ended
Mar. 31, 2020
Notes Tables  
Schedule of Inventory, Current [Table Text Block]

 

March 31, 2020

   

December 31, 2019

 

Raw materials

  $ 24,177     $ 15,570  

Work in process and sub-assemblies

    50,441       50,787  

Finished goods

    12,491       18,671  

Total inventories

  $ 87,109     $ 85,028